Question

how to integrate :
(cos(sx)/(1+x^2))dx

Answer 1

\[\int\limits \frac{ \cos(sx) }{ 1+x^2 }ds\] you can treat 1/(1+x^2) as a constant

Answer 2

Let u = sx, du = xds, can you go from there?

Answer 3

\[\frac{ 1 }{ (1+x^2) } \int\limits \cos(sx) ds\]

Answer 4

Hey did you figure out, still need help?

Answer 5

iam sorry ... a slight mistake in the question .... it is not 'ds'.. but '
dx'